CN214698734U

CN214698734U - Bolt anti-loosening structure

Info

Publication number: CN214698734U
Application number: CN202120806758.XU
Authority: CN
Inventors: 张一兵
Original assignee: Zhenjiang Hefeng Fastener Manufacturing Co ltd
Current assignee: Zhenjiang Hefeng Fastener Manufacturing Co ltd
Priority date: 2021-04-19
Filing date: 2021-04-19
Publication date: 2021-11-12
Anticipated expiration: 2031-04-19

Abstract

The utility model provides a bolt anti-loosening structure, which comprises a bolt, and a main nut and an auxiliary nut which are mutually matched, wherein the main nut comprises a nut body and an anti-loosening piece, the anti-loosening piece is in a round platform shape, the anti-loosening piece is eccentrically fixed on the end surface of the nut body, and the outer side wall of the anti-loosening piece comprises a near shaft section close to the axis of the bolt and a far shaft section far away from the axis of the bolt; the auxiliary nut is screwed on the end part of the bolt, the bottom of the auxiliary nut is provided with a truncated cone-shaped groove body, the groove body and the bolt are coaxially arranged, the anti-loosening piece extends into the groove body, and the auxiliary nut is screwed to enable the groove body to be tightly attached to the side wall of the far shaft section of the anti-loosening piece. The utility model discloses can lock bolt and nut effectively, prevent to appear becoming flexible between main nut and the screw rod.

Description

Bolt anti-loosening structure

Technical Field

The utility model belongs to the technical field of the fastener, concretely relates to bolt anti loosening structure.

Background

The anti-loose design of the bolt is a common problem in the mechanical installation process, particularly under the severe working conditions of high-frequency vibration, the nut is easy to separate from the bolt, and in order to improve the problem, a common method is to use a fastening washer with sawteeth to increase the clamping force between the nut and a workpiece, but the sawteeth of the fastening washer may damage some precise workpieces or the workpieces with smooth surfaces, so the application range of the fastening washer is limited. Furthermore, the tightening washer may still not be effective in providing a locking force to the bolt and nut assembly when subjected to severe vibration conditions.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a bolt anti loosening structure is in order to solve above-mentioned problem.

The utility model provides a following technical scheme:

a bolt anti-loosening structure comprises a bolt and a main nut and an auxiliary nut which are matched with each other, wherein:

the main nut comprises a nut body and an anti-loosening piece, the anti-loosening piece is in a circular truncated cone shape, the anti-loosening piece is eccentrically fixed on the end face of the nut body, and the outer side wall of the anti-loosening piece comprises a near shaft section close to the axis of the bolt and a far shaft section far away from the axis of the bolt;

vice nut spiro union in the tip of bolt, the bottom of vice nut is equipped with the cell body of round platform type, the cell body with the coaxial setting of bolt, prevent that loose spare stretches into in the cell body, revolve wrong vice nut can make the far-axis section lateral wall of preventing loose spare is hugged closely to the cell body.

Preferably, the inner wall of the anti-loosening element is formed with an internal thread meshed with the screw.

Furthermore, a jack is formed inside a far shaft section of the anti-loosening piece, the jack comprises a first hole section and a second hole section which are communicated with each other in an included angle mode, the top of the first hole section upwards penetrates through the anti-loosening piece, and one end, far away from the first hole section, of the second hole section penetrates through the side wall of the anti-loosening piece; insert first plug-in components and second plug-in components in first hole section and the second hole section respectively, stretch out at the top of first plug-in components first hole section, the bottom face of first plug-in components is the wedge face and hugs closely the side end face of second plug-in components, the second plug-in components receive the extrusion of first plug-in components and stretch out second hole section and extrusion the lateral wall of cell body.

Preferably, the first bore section and the second bore section are in perpendicular communication with each other.

Preferably, a first limiting groove communicated with the first hole section is formed in the anti-loosening element at the first hole section, a first limiting block is fixedly connected to the first plug-in element, and the first limiting block moves up and down in the first limiting groove.

Preferably, a second limiting groove communicated with the second hole section is formed in the anti-loosening element at the second hole section, a second limiting block is fixedly connected to the second plug-in element, and the second limiting block moves left and right in the second limiting groove.

Furthermore, the anti-loosening piece comprises an anti-loosening piece base body and an anti-loosening block, the anti-loosening piece base body is fixedly connected to the top end of the main nut, an assembly notch matched with the anti-loosening block is formed in the anti-loosening piece base body, and the anti-loosening block is inserted into the assembly notch; the first hole section and the second hole section are both located on the anti-loosening block.

Preferably, the assembly notch is of a fan-shaped structure, and the virtual circle center of the fan-shaped structure is located on the axis center of the truncated cone-shaped side wall of the anti-loosening element.

Preferably, locking piece is including the first block and the second block of concatenation each other, the shaping has first half hole and second half hole on the first block, shaping third half hole and fourth half hole on the second block, first half hole with the concatenation of third half hole is first hole section, the concatenation of second half hole and fourth half hole is the second hole section.

The utility model has the advantages that:

the utility model is provided with a main nut and an auxiliary nut, the main nut is screwed on the bolt, an anti-loosening piece is arranged on the end surface of the main nut, and the side wall of the anti-loosening piece and the axis of the bolt are eccentrically arranged; the bottom of the auxiliary nut is provided with a groove body, the anti-loosening piece extends into the groove body, when the auxiliary nut is screwed to a certain depth, the groove body is tightly attached to the far shaft section of the side wall of the anti-loosening piece, the anti-loosening piece is extruded in the axis direction of the screw, and the anti-loosening piece further extrudes the screw, so that the main nut is not easy to rotate relative to the screw, and the anti-loosening effect is realized. The utility model discloses a locking bolt and work piece between the nut can not cause destruction to workpiece surface.

In order to further fasten counter nut and locking piece, it is not hard up to produce when preventing its vibrations, the utility model discloses first hole section and the second hole section that each other is contained angle formula intercommunication at the inside shaping of the distal shaft section of locking piece, insert first plug-in components and second plug-in components in first hole section and the second hole section respectively, first hole section is stretched out at the top of first plug-in components, the bottom face of first plug-in components is the wedge face and hugs closely the side end face of second plug-in components, after the first plug-in components of counter nut downward extrusion, the wedge of first plug-in components is to the side extrusion second plug-in components until the tip of second plug-in components stretch out the lateral wall of second hole section and extrusion cell body, packing force between counter nut and the locking piece has been increased, the fastening effect of locking piece to the screw rod has been guaranteed.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view of the assembly structure of the auxiliary nut of the present invention when it is loosened;

FIG. 2 is an enlarged schematic view of portion A of FIG. 1;

FIG. 3 is a schematic view of the assembly structure of the auxiliary nut of the present invention during locking;

FIG. 4 is an enlarged schematic view of portion B of FIG. 2;

FIG. 5 is a schematic top view showing the structure of the retainer of example 4;

fig. 6 is an assembly view of the anti-loosening block in embodiment 4.

Labeled as: 1. a bolt; 2. a main nut; 3. a secondary nut; 4. a workpiece; 5. a nut body; 6. an anti-loosening element; 7. a proximal shaft section; 8. a distal shaft section; 9. a trough body; 10. a first bore section; 11. a second bore section; 12. a first plug-in; 13. a second plug-in; 14. a wedge-shaped surface; 15. a first limit groove; 16. a first stopper; 17. a second limit groove; 18. a second limiting block; 19. an anti-loosening element base body; 20. anti-loosening blocks; 21. assembling the notch; 22. a first block; 23. a second block; 24. a first half-bore; 25. a second half-hole; 26. a third half-hole; 27. a second half-bore.

Detailed Description

Example 1

As shown in fig. 1 to 4, a bolt anti-loosening structure comprises a bolt 1 and a main nut 2 and an auxiliary nut 3 which are matched with each other, wherein the bolt 1 is in threaded connection with two workpieces 4, the main nut 2 comprises a nut body 5 and a loosening-preventing piece 6, and the nut body 5 is screwed on a screw rod of the bolt 1; the anti-loosening element 6 is in a circular truncated cone shape, the anti-loosening element 6 is eccentrically fixed on the end face of the nut body 5, and the outer side wall of the anti-loosening element 6 comprises a near shaft section 7 close to the axis of the bolt and a far shaft section 8 far away from the axis of the bolt. The inner wall of the anti-loosening element 6 can be smooth, and preferably, the inner wall of the anti-loosening element is provided with internal threads meshed with the screw, so that the anti-loosening effect of the anti-loosening element 6 on the screw after being extruded by the auxiliary nut 3 is enhanced.

The auxiliary nut 3 is screwed on the end part of the bolt 1, the bottom of the auxiliary nut 3 is provided with a truncated cone-shaped groove body 9, the groove body 9 and the screw rod are coaxially arranged, the anti-loosening piece 6 extends into the groove body 9, the auxiliary nut 3 is continuously screwed, the groove body 9 can be enabled to compress the far axial section side wall of the anti-loosening piece 6, the anti-loosening piece 6 is further enabled to firmly compress and interlock the screw rod, the main nut 2 cannot rotate relative to the screw rod, and anti-loosening performance is improved.

Example 2

The difference between this embodiment and embodiment 1 is that, as shown in fig. 2 and 4, the distal shaft section 8 of the anti-loosening element is internally formed with a socket, which includes a first hole section 10 and a second hole section 11 that are in included angle type communication with each other, and preferably, the first hole section 10 and the second hole section 11 are in perpendicular communication with each other. The top of the first hole section 10 penetrates the anti-loosening element 6 upwards, and the end of the second hole section 11 far away from the first hole section penetrates the side wall of the anti-loosening element 6. The first and

second hole sections

10 and 11 are respectively inserted with a first and

second insert

12 and 13. The top of the first insert 12 protrudes out of the first bore section 10 and can thus receive pressure from the secondary nut 3. The bottom end face of the first plug-in 12 is a wedge face 14, the wedge face 14 is tightly attached to the side end face of the second plug-in 13, when the auxiliary nut 3 is screwed downwards, the groove body 9 extrudes the first plug-in 12 downwards, the first plug-in 12 pushes the second plug-in 13 outwards through the wedge face 14 until the second plug-in 13 extends out of the second hole section 11 and extrudes the side wall of the groove body 9, so that the extrusion force between the groove body 9 and the anti-loosening piece 6 is increased, the anti-loosening piece 6 extrudes the screw inwards more tightly, and looseness between the screw and the main nut 2 is prevented.

Example 3

This example is a further improvement on example 2.

As shown in fig. 2 and 4, in this embodiment, a first limiting groove 15 communicating with the first hole section 10 is formed in the anti-loosening element 6 at the first hole section 10, a first limiting block 16 is welded or integrally formed on the first plug-in element 10, when the first plug-in element 12 moves up and down, the first limiting block 16 moves up and down in the first limiting groove 15, and the first limiting groove 15 prevents the first plug-in element 12 from falling off from the first hole section 10.

Similarly, a second limiting groove 17 communicated with the second hole section is formed in the anti-loosening element 6 at the second hole section 11, a second limiting block 18 is fixedly connected to the second plug-in element 13, and the second limiting block 18 moves left and right in the second limiting groove 17. The second stop groove 17 prevents the second insert 13 from falling out of the second bore section 11.

Example 4

This example is a further improvement on example 2. As shown in fig. 5, the locking member 6 includes a locking member base 19 and a locking block 20, the locking member base 19 is integrally formed on the top end of the main nut 2, an assembly notch 21 adapted to the locking block 20 is formed on the locking member base 19, and the first hole section 10 and the second hole section 11 are both located on the locking block 20. When the anti-loosening piece is used, the anti-loosening piece base body 19 is firstly sleeved on the screw, then the anti-loosening block 20 is inserted into the assembling notch 21, and then the auxiliary nut 3 is screwed on the screw. This embodiment will prevent that loose piece 6 sets up to split type structure, conveniently dismantles anti-loose piece 20 to provide the fastening effect of different degrees, and be convenient for change new anti-loose piece after anti-loose piece 20 damages.

The fitting notch 21 of the present embodiment is a fan-shaped structure, and the virtual center of the fan-shaped structure is located on the axis of the truncated cone-shaped side wall of the anti-loose member 6. The assembly gap 21 of the fan-shaped structure enables the anti-loose block 20 to be quickly and accurately inserted into the assembly gap 21, and based on the positioning effect of the fan-shaped structure, when the anti-loose block 20 is assembled, even if a screw rod is not installed in the anti-loose piece, the anti-loose block 20 is not easy to be separated from the assembly gap 21.

In order to facilitate the formation of the first hole section 10 and the second hole section 11, as shown in fig. 6, the locking block 20 includes a first block 22 and a second block 23 which are mutually spliced, a first half hole 24 and a second half hole 25 are formed on the first block 22, a third half hole 26 and a fourth half hole 27 are formed on the second block 23, the first half hole 24 and the third half hole 26 are spliced to form the first hole section 10, and the second half hole 25 and the fourth half hole 27 are spliced to form the second hole section 11. During assembly, the first plug-in unit 12 and the second plug-in unit 13 are only required to be inserted into corresponding half holes of the first block 22 or the second block 23, and then the first block 22 and the second block 23 are jointed and spliced and plugged into the assembly notch 21.

The using method of the embodiment comprises the following steps: inserting the first plug-in unit 12 and the second plug-in unit 13 into corresponding half holes on the first block 22 or the second block 23, then jointing the first block 22 and the second block 23, and plugging the first block 22 and the second block 23 into the assembly gap 21; the main nut 2 is screwed on the screw, the auxiliary nut 3 is screwed on the screw, the first plug-in piece 12 gradually moves downwards in the process and pushes the second plug-in piece 13 outwards until the auxiliary nut 3 extrudes the far shaft section 8 of the anti-loosening piece inwards, the second plug-in piece 13 extends out of the second hole section 11, the inner wall of the groove body of the auxiliary nut 3 is extruded, and the anti-loosening piece 6 extrudes the screw inwards under the reaction force of the auxiliary nut 3, so that the main nut 2 is reliably locked on the screw.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a bolt anti loosening structure, includes the bolt and the main nut and the vice nut of mutually supporting, its characterized in that:

2. The bolt looseness prevention structure of claim 1, wherein an inner wall of said looseness prevention member is formed with an internal thread to be engaged with the screw.

3. The bolt looseness prevention structure of claim 2, wherein a plug hole is formed in the far shaft section of the looseness prevention piece, the plug hole comprises a first hole section and a second hole section which are in included angle type communication with each other, the top of the first hole section penetrates through the looseness prevention piece upwards, and one end, far away from the first hole section, of the second hole section penetrates through the side wall of the looseness prevention piece; insert first plug-in components and second plug-in components in first hole section and the second hole section respectively, stretch out at the top of first plug-in components first hole section, the bottom face of first plug-in components is the wedge face and hugs closely the side end face of second plug-in components, the second plug-in components receive the extrusion of first plug-in components and stretch out second hole section and extrusion the lateral wall of cell body.

4. The bolt looseness prevention structure of claim 3, wherein said first hole section and said second hole section are in perpendicular communication with each other.

5. The bolt looseness prevention structure of claim 3, wherein a first limiting groove communicated with the first hole section is formed in the looseness prevention piece at the first hole section, a first limiting block is fixedly connected to the first plug-in piece, and the first limiting block moves up and down in the first limiting groove.

6. The bolt looseness prevention structure of claim 3, wherein a second limiting groove communicated with the second hole section is formed in the looseness prevention piece at the second hole section, a second limiting block is fixedly connected to the second plug-in piece, and the second limiting block moves left and right in the second limiting groove.

7. The bolt looseness prevention structure of claim 3, wherein the looseness prevention member comprises a looseness prevention member base body and a looseness prevention block, the looseness prevention member base body is fixedly connected to the top end of the main nut, an assembly notch matched with the looseness prevention block is formed in the looseness prevention member base body, and the looseness prevention block is inserted into the assembly notch; the first hole section and the second hole section are both located on the anti-loosening block.

8. The bolt looseness prevention structure of claim 7, wherein said fitting notch is a fan-shaped structure, and a virtual center of the fan-shaped structure is located on a central axis of the truncated cone-shaped side wall of said looseness prevention member.

9. The bolt looseness prevention structure of claim 7, wherein said looseness prevention block comprises a first block body and a second block body which are mutually spliced, a first half hole and a second half hole are formed in said first block body, a third half hole and a fourth half hole are formed in said second block body, said first half hole and said third half hole are spliced to form a first hole section, and said second half hole and said fourth half hole are spliced to form a second hole section.